The binding sites of Iron atom in the structure of Nitrogenase Mo-Fe Protein From Klebsiella Pneumoniae, Nifv Mutant (pdb code 1h1l). This binding sites where shown with 5.0 Angstroms radius around Iron atom. The 1h1l structure was solved by S.M.MAYER, C.A.GORMAL, B.E.SMITH, D.M.LAWSON, with X-Ray Crystallography technique, brief refinement statistics is given in the table below: